Potentials and limitations of coupling ASTER and airborne geophysical data for improvement of geological mapping in arid region (Namibia, Rehoboth region)

Cecile Gomez; Christophe Delacourt; Pascal Allemand; Patrick Ledru

doi:10.1117/12.510492

13 February 2004 Potentials and limitations of coupling ASTER and airborne geophysical data for improvement of geological mapping in arid region (Namibia, Rehoboth region)

Cecile Gomez, Christophe Delacourt, Pascal Allemand, Patrick Ledru

Author Affiliations +

Proceedings Volume 5239, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III; (2004) https://doi.org/10.1117/12.510492
Event: Remote Sensing, 2003, Barcelona, Spain

Abstract

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) launched on NASA’s Terra satellite ranks lately among potential tools for Earth Observation. ASTER measures reflected radiations in 3 bands between 0.52 to 0.86 μm (VNIR) and in 6 bands between 1.6 to 2.43 μm (SWIR). An ASTER image has been acquired on the Southern margin of the Damara orogen (Namibia, northern margin of the Nama marine sedimentary sequence) essentially composed by limestone, sandstone and shale. Furthermore, a program initiated by the Geological Survey of Namibia has permitted to obtain a radiometric data set (Thorium, Uranium and Potassium) of Rehoboth region in Namibia. The combined ASTER and airborne geophysical data have been processed and interpreted for improving the existing geological map. First, a Principal Component Analysis (PCA) on the 9 ASTER bands is realized and only the first five components are kept. Then, the Maximum Likelihood approach is used to identify lithological formations from radiometric data and PCA components. Importance of random training data has been pointed out. Finally the coupling of ASTER and radiometric data is the best approach for the improvement of geological map with a proportion of correctly mapped surface of 63.4% from initial geological map.

Citation Download Citation

Cecile Gomez, Christophe Delacourt, Pascal Allemand, and Patrick Ledru "Potentials and limitations of coupling ASTER and airborne geophysical data for improvement of geological mapping in arid region (Namibia, Rehoboth region)", Proc. SPIE 5239, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III, (13 February 2004); https://doi.org/10.1117/12.510492

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Associative arrays

Principal component analysis

Environmental monitoring

Geographic information systems

Geology

Radiometry

Reflection

Show All Keywords

Keywords/Phrases

Search In:

Publication Years